The IRA was in contact with Red Army intelligence officers in London and New York, and it was in the former that the monthly stipend was handed over. The IRA’s senior officer in London passed along military intelligence, including specifications of British submarine detection sonar and aeroplane engines for bombers, military journals and manuals, and gas masks. In addition he arranged false passports for Soviet agents and even for a communist operative to travel to Romania in the guise of an Irish woollens salesman! It was in New York, however, that the Soviets got the most valuable information, from an IRA agent code-named ‘Mr Jones’. Jones’s sources likely included serving members of the US military, as he was able to provide reports of the army’s chemical weapons service, state-of-the-art gas masks, machine-gun and aeroplane engine specifications, and reports from the navy, air service and army. In Jones’s estimation, Soviet intelligence in the US would have been ‘helpless’ without the information he supplied.
Source: History Ireland